Service Manual User Manual

Section 9
9-36
b. Stabil-TRAK Modes
The function of the Stabil-TRAK system varies under dif-
ferent operating conditions. The basic modes include the
free pivot mode (Fig. 9– 25), final positioning mode
(Fig. 9– 26), and locked mode (Fig. 9– 27). A hydraulic cir-
cuit diagram of each of the modes is included on the fol-
lowing pages.
Free Pivot Mode
(Fig. 9– 25)
• Rod Oil OUT
Conditions: Boom angle is below 40°. Rear axle pivots
freely, solenoids 1 and 2 energized, the travel select lever
is in FORWARD (F) or REVERSE (R), park brake OFF
and service brake OFF.
With solenoids 1 and 2 energized, hydraulic fluid from the
rod end of the stabilizer cylinder flows through the stabi-
lizer block and solenoid-operated valves, to the base side
of the stabilizer cylinder. Because the volume of oil
needed on the base side is larger than that needed on
the rod side, the extra oil needed is supplied from the
main hydraulic system through a 100 psi (7 bar) reducing
cartridge in the stabilizer block.
Free Pivot Mode
(Fig. 9– 25)
• Base Oil OUT
Conditions: Boom angle is below 40°. Rear axle pivots
freely, solenoids 1 and 2 energized, the travel select lever
is in FORWARD (F) or REVERSE (R), park brake OFF
and service brake OFF.
With solenoids 1 and 2 energized, hydraulic fluid from the
base end of the stabilizer cylinder flows through the stabi-
lizer block and solenoid-operated valves, to the rod side
of the stabilizer cylinder. Because the volume of oil
needed on the rod side is less than that needed on the
base side, excess oil is returned to the tank through a
100 psi (7 bar) reducing cartridge in the stabilizer block.
Model 3606 • Origin 10/99